Interesting. For Obra Dinn I felt the outlines were key to legibility and wanted them to be as clean as possible. Which meant the relatively art-heavy burden of marking each object with a special color to define how it should generate edges. You wouldn't get that with realtime video of a live scene, so you'd need to tease it out of depth&color. That's how most 3D edge detection works anyways so it's not really a problem, just a little less precise than what I wanted.